Facebook users can choose to join one or more networks on the website, such as a school, place of employment, geographic region, or school group. These networks help users connect with members of the same network. Users can also connect to friends, giving them access to their friends' profiles.
The website is free to users, but generates revenue from advertising, including banner ads. Users create profiles that often contain photos and lists of personal interests, exchange private or public messages, and join groups of friends. The viewing of detailed profile data is restricted to users from the same network or confirmed friends.
Microsoft is Facebook's exclusive partner for serving banner advertising, and as such Facebook only serves advertisements that exist in Microsoft's advertisement inventory, which only contains advertisements that have been pre-approved by Microsoft and have an existing agreement established between Microsoft and the advertiser. When compared with other web companies, Facebook collects as much data from its visitors as Google and Microsoft, but considerably less than Yahoo!. The data collected is used to show more relevant advertisements to website visitors.
Facebook Features: The media often compares Facebook to Myspace, but one significant difference between the two websites is the level of customization. Myspace allows users to decorate their profiles using HTML and Cascading Style Sheets (CSS), while Facebook only allows plain text. The lack of decoration has been said to make the site more appealing to job seekers. Users can network, and even announce to their friends that they are seeking. In April 2007, CareerBuilder introduced a Facebook application that allows job recruiters to search through profiles.
Several features from the original Facebook website still exist. They include the Wall, a space on every user's profile page that allows friends to post messages for the user to see, Pokes, which allows users to send a virtual "poke" to each other. Photos, where users can upload albums and photos, and status, which allows users to inform their friends of their whereabouts and actions. The Facebook Wall allows users to post messages on the profile of their friends. A user's Wall is visible to anyone who is able to see that user's profile, which depends on their privacy settings. In July 2007, Facebook began allowing users to post attachments to the Wall, whereas the Wall was previously limited to textual content only.
Over time, Facebook has added several new features to its website. On September 6, 2006, a New Feed was announced, which appears on every user's homepage and highlights information including profile changes, upcoming events, and birthday related to the user's friends. Initially, the New Feed caused dissatisfaction among Facebook users: some complained that the News Feed was too cluttered and full of undesired information, while